new helper: file_inode(file)

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/drivers/media/v4l2-core/v4l2-dev.c b/drivers/media/v4l2-core/v4l2-dev.c
index 98dcad9..870de1d 100644
--- a/drivers/media/v4l2-core/v4l2-dev.c
+++ b/drivers/media/v4l2-core/v4l2-dev.c
@@ -222,7 +222,7 @@
 
 struct video_device *video_devdata(struct file *file)
 {
-	return video_device[iminor(file->f_path.dentry->d_inode)];
+	return video_device[iminor(file_inode(file))];
 }
 EXPORT_SYMBOL(video_devdata);